burne burner



' Feb. 19, 193,5. A. c. KALK BURNER Filed July 21, 1930 Patentedr Feb. 19t, 1935 BURNER I 'j lf'TAlbcrt C. Kal-k,A Chicago, Il1.,assignor to The G.

f W; Dulaney` Trust, Chicago, lllgacommon law L pplijtioii Juli '21, 1930, serial No. 469366 centimel (01158-409) V The present invention relates to improvements in gasburners.`

One Ofthe-primary objects 'otthe present yinvention resides in lthe provision of""a novel-ligas vburner provided with a piloti burner Yand means the pilot burner becomesextinguished. Y

Another `object residesinthe provisionV of .a new and improvedburnerincluding as part of its unitarystructurefa thermostatic control element and a pilot "burnerarranged to direct its vflame for cutting off the supply of Aair in the event that y Further objects and apparent as Vthe description proceeds. i

In the `accompanyingmdrawing; Figure 1 isja longitudinal sectional View takenvalong line 1--1 of .Fig.l2 lofaa burner embodying ilthe features of adyantages willbeciorne Fig. 2 is alongitudinalsectional View taken alonglineZ-'ZofFigl. i H y Eig. 3 is Aa' transverse s ectional'view taken along line 3`3 o'fliigglpwJ i H- Y v s While'. the' invention ,is 'susceptible "of various modificationsY `andV alternative' constructions; "'I' have showningthe'r'drawing and willf herein .describe v in Vdetail-vthe `.preferred embodiment, but it is to vbe understood that Idol not therebyV intend to limit the invention.y to the specic vform-disclosed,r but intend tovcover all modifications and alternative constructions falling witlfiin'the spirit andscope of the invention aszexpressedin the apw pended claims.

Referring more particularlytothe drawing, the burner constituting theexemplary embodiment ofthe .invention 'comprises an elongated burner nozzle 10. adapted to be mounted in aisuitable burner` well (not` shown) Preferably; thefnozzle V10` is-A in the Vform of agtube-.oisujtable rnateriaL,4

the discharge Jend of which is formed Vwith an in`- wardly curved peripheral-flip 11,` and the' other end of which is'thread'edafinto a casing 12 formed with a `fuel supply chamber 13. `The `casing' .12; is formed with Va. mounting flange l4` adapted to:l

be secured tothe'burner support (not shown). A proportionalmixer is provided forV supplying a fuelI xnixtureto therchamber 1?.` In the present instance,` the'v mixer comprises an expandingA mix-` ing` cone 15 dening 'a flaring passage. 16 with a" straightrestricted throat-17=at theI inlet lend. Preferably, the cone1`5 is formed integrally with the` casing 12,'V and opens to one side of the cham# berv13 at a slight angle. Mountedon the freeend ,of thecone 15 and preferablyntegral therewith isacasing` 18 defining a chamber19 infcorr'ln'lue' nic'ation with the throat 1'7, and adapted to be connected through a` pipe'20 to a' source (not l shown) ofjone of the constituents of the fuel mixture, for example fuel gas. l Y Y Threaded through the .outer'lend wall ofYthe 4 casing 18into the chamber 19 andextending in 5 axial alinernent with the expanding cone 15 is a nozzle( 21 which is adapted to be connected through arpipe 22 to a suitable source (not shown) of the other constituent of,` the fuel mixture. Y Preferably, thepipe 22 is connected to a suitable blower (not shown) for supplying air under pressure, and controlled by a suitable switch 23. The discharge end ofthe nozzle21ois restricted, and isspacedslightlyfrom the inlet of the Ythroat 17 fuel gas from'the chamber: 191 into the :throat 17. Inpas'sing through the tube..15,' the air andgas will be thoroughlyV mixed.

I 2o "*Itwill be evident :that the amount of fuel mixture 'supplied to the chamberrlmay be varied by regulating the amount of air supplied to the nozzle 21; `without appreciably varying theV air-gas ratio, and hence that if theablower is renderedinf operative through opening of, the controlA switch 23; no flow of fuel .from the pipe Y20 Ato the chamberlBvwill be induced. Preferably, means (not shown) areinterposecl `in-the pipe 2O to preventl any how `of 4fuel therethrough to the burner 10 .30 when the air supply is cut oi; Y. The rear end 4Wall of the chamber-13 opposite the` burnerV nozzle 10 is formed withv anraxially alineclbore 24 the inner end of which has a countersunkgrecess 25, `An elongated tubel 26 Vis an chored at one end in the recess 25 with its inner surfaceflush with the surface offthe bore 24, andextends throug'hthe chamber 13 and concentrically `in `peripherally spaced. relation through the burner nozzle 10. The free end Yof 40 the Vtube. 26 terminatesfin the :burner nozzle 10 a short distance from theicurved lip 11. Mounted inthefree end ofthe tube V26 and extending there-` from-substantiallyinto Athe planeyof thelip 11 is a s1eeve'27. The burner tube 10 and the sleeve,

V27 dene an annular` chamber 28 opening lat the Y lip 11 vthroughga restricted annular discharge orice 29. The burner tube 10 and the inner tube 26 denne 'anannular passage 30 opening from the supplychamber 13 inthe casing 12 tothe cham- 50 plurality .of peripherallyspaced orices 32, four 5.5, g

tension 33 which is cut away atvopposite sides asV indicated at 34 to form air inlet openings 35 establishing communication between the inner tube 25 and the atmosphere.

A primary pilot burner is provided for igniting the fuel mixture discharged from the sleeve 27. In the present instance, this Apilot burner comprises a pipe 36 extending'into the'tube 26 and along the bottom thereof. The discharge end of the pipe 36 is formed with a jet orifice37 inclined to direct a small stream of fuel gas at an angle upwardly into the passage 31.

The other end `of the pipe 36exte`nds through and isY secured asby means of va set screw 38 in an upstanding lug 39 formed in the bottom of Ythe casing extension 33, and rthen is bent at right angles to extend out ofthe extension 33 through a longitudinalslot 40 in the bottom for connection vto a source (not shown) of fuel gas. It will be evident that'the pilot burner is adjustable-1ongitudinally upon loosening the set screw 38, and that in such adjustment the slot 40 through coaction with the sides of the bent portion of the pipe 36 serves tomaintain the discharge orice 37 in the desired'angular position.'

Suitable thermostatic-.control means is provided forautomatically. cutting off thesupply of fuel mixture in the vevent thatthe pilot burner 36 becomes extinguished. In .the present instance, this means comprises anzelongated cylindrical thermostatic element 41 one end of which is con Y l `nectedto the switch 23.." The specific construction of vthe thermostatic element 41 and the ,switch 23 is' not disclosedsince per. se it forms no part of the invention.Y It'will suffice to say that when the element isheated it'` will close the switch 23 to establish operationl ofthe blower, and that when -it is not heated it will open the switch to stop the operation'of the blower;V

Preferably, the switch 23'is mounted on a sleeve 42 secured in the rear end wallofthe casing extension 33. rlheV thermostatic element 41 extends from the switch-23 through Vthe sleeve 42, the casing extension 33, and into andV closely along theV top of the tube 26 directly over` the pilot burner 36.V The'free end of thethermostatic element 41 terminatesjust vshort of the sleeve 27, and in position for impingement lby theY pilot flam'e,--"Excepting' for the tip exposed to lthe pilot flame, the thermostatic element is enclosed with a covering 43 of suitable heat insulating material, suchras asbestos. Y

. The operation will be evident from the fore-l going." Briefly stated-when the pilot burner is ignited, the pilot flame will impinge against the tip of the thermostatic element 41, thereby causing the switch 23 to be closed so thatthe blower will supply air -to the pipe 22. Fuel mixture thus is supplied to the burne'rtube 10 and-to the orifices 32. Should the primary'pilot burner become Vextinguished,v the thermostatic element" 41 in the absence ofthe varne will cool, thereby causing the switch 23 to be opened. As a result, the supply of air under pressure to the proportional mixer'will be discontinued, vand henceno vfuel mixture will be supplied."

It will beVA evident that IA have provided a novel burner comprising a pilot burner and a thermostatic control responsive to the primary burner in a unitary construction which is simple, compact, and inexpensive, and which is ecient and safe in operation.

I claim as my inventionz- Y 1. A burner comprising, in combination, a casing forming` a` fuel chamber, a burner nozzle mounted on said casing and communicating with said chamber, a tube extending through said chamber into said nozzle, said'tube being peripherally spaced from said nozzle to define a passage therewith, one end of said tube being open to the atmosphere and the other end of said tube terminating short'of the discharge end of said nozzle, an elongated thermostatic element extending into said tube, andY a pilot burner extending into said tube in parallel relation to said element, said pilot burner being formedY with an inclined orice for directing a pilot ame to impinge against the tip of said element. f

2. VA burnerV comprising, in combination, an elongated burner tube,fan inner concentric tube defining a peripheral passage therewith, means forfsupplying fuel to said, passage, said inner tubebeing connected to a source of Vair and terminating inthe discharge `end of said burner tube, and a pilotburner extending into said inner tube longitudinally thereof, said pilot burner being adjustable longitudinally of, said 'inner tube.

3. .A `*burner comprising, in combination, an outer tube, thedischarge endl of saidxtube being turnedV in to form'a'lp, ian inner air tube ex nozzle, a sleeve mounted in said member and pro- Vjecting ltherefrom to thedischarge ,endv of said v nozzle, said` member opening to said sleeve, a

plurality of peripherally spaced orifices formed in said sleevearnd opening therethrough from said nozzle Yto the interior of said sleeve, and means for supplying fuel to said nozzle.

5. A burner comprising, yin combination, a burner nozzle, a'tube within said nozzle and terminating short of the discharge end thereof, a sleeve mounted in said tube and projecting ,therefrom substantially to said discharge end, said sleeve defining a peripheral discharge orifice with said nozzle and beingformed with a Venturipassage,` a plurality ofV peripherallyfspaced orifices formed in said sleeveV and opening from said nozzle to the expanding cone of said passage, and meansfor supplying fuel', to said nozzle. f

6. A burner comprising, in combination, a casing, anelongated hollow burner nozzle connected to said casing, an elongated thermostatic element in-said nozzle,-an elongated pilot burner in said nozzle; said pilot burnerhaving an inclined discharge orifice orientated vto direct the pilot flame against Asaid element, means for adjusting Vsaid pilot yburner longitudinally, and means for preventing rotation of saidpilot burner during adjustment thereof to maintain said orientation. Y

" i 1' C. KALKA` 

